Robert Lee Hotz discusses the discovery in Ethiopia of what researchers consider the earliest known traces of stone-tool use, possibly pushing back the advent of technology about 800,000 years.

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Gou ... science Torino very interesting signs ... of a story on Testim relatives ... the whole minutes ... for using too long before we thought there was a long long that's according to ... opinion finding published in the journal nature ... late ... what what did they discover and wiring and was the talents ... we see evidence of our ability to innovate everywhere we lower ... our ability to manipulate things in the environ around its target to ... be Ethiopia team is announcing today that they found ... innocent of scratches on these bones there on the screen right now ... the earliest known evidence of true muses is the ... perhaps be the ... earliest sign we have two of the origin of that impulse to inundate ... it is nearly a million years ... older than anyone thought in fact it's not even on ... the exercise by a member of our corrective human family The genus ... I hopped on these loans the scratches are they believe the evidence ... up to use of these primitive butchers if you'd like ... kayaking and smacking and slicing away ... at reexamined by a bouncer ... on the ... grasslands and political aides in East Africa ... about three point four million years ago ... Damascus thousand Volt was ... the news that the stones will use ... is about two point four million years this is this is the real me back into the darkness ... when I guess the simple question to to the average guy that looks like a scratch on of bone having no that's not the ones ... who for instance ... or ... of that is exactly what LendingTree did ... is this really cool about ... thinking back to actual schooling ... well they had us ... Juricic says it is nice re analyzing the scratches under electron microscopes and things ... to be able to tell them to ... do with the service was ground or or impacted by whatever ... the suspension of some fairly ... reliable conclusions ... about life or if you can see this on the screen and they have a very distinctive to ... the roof shaped the signs are rough ... tooth enamel ... these are very smooth scratch that only ... the workers ... these are the ... I'm due in large and ancient crocodiles ... and as a sign that some scientists have come and settle things with because the Sossego of all the news that is dividends into an opponent somebody include I think so this is not well controlled see rightly ... yes there is a leading specialist in the study you aren't ... really think this is the dumbest thing that ever heard ... people have been looking in this very region ... systematically for forty years looking for evidence of early stone tools ... and have never thought ... that ... they think that these researchers ... are overreaching perhaps ... making ... moribund than what we are ... entrusting of overreaching were a radical version isn't something I can read Wesley Hospital the Dow and Los Angeles' read more about the onthe vs Datacom you mean by twenty seven we visited tools maybe we need to adopt the economy's them out with ... the Fed needs ... over the ... surface of a two out to make them more Sts ... thx